Knife for guillotine paper-cutting machines.



No. 700,053. Patented May |3,'|9o2. T. B. KEND'ELL.

KNIFE FOR GUILLOTINE PAPER CUTTING MACHINES.

(Appl icstion filed mu. 7. 1902.

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b 6 J & 5 f I U ITE-n STATEs PATENT Grates.

THOMAS BOULTON KENDELL, OF LONDON, ENGLAND.

KNIFE FOR GUILLOTINE PAPER-CUTTING MACHINES.

SPECIFICATION formingpart of Letters Patent No. 700,053, dated May 13, 1902. 7

Application filed March 7,1902. Serial No. 97,119. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS BOULTON KEN- DELL, a subject of the King of Great Britain, residing at Norfolk IronWorks, Shoreditch, I London, England, haveinvented new and useful Improvements in and Connected with Knives for Guillotine Paper Cutting Machines, of which the following is a specification.

This invention relates to improvements in and connected with knives for guillotine paper-cutting machines, the object being to provide efficient means whereby such knives can be adjusted in their carriages to compensate for wear.

According to the invention I provide the top or back of the knife with a number of re cesses, (the number corresponding with the number of bolts used,) and in each of the said recesses I drill two holes diametrically opposite to one another and on a vertical line through the center of the recess. In conjunction with each recess Imake use of a bolt the screw-threaded stem of which is adapted to be bolted to the carriage in the usual manner-and the head of which is eccentric to the stem and fits into the recess. The under side or inside of the head is formed or providedwith a projection or pin of the same crosssectional shape as the bolt-stem. WVith this arrangement the knife is first secured to the carriage by passing the bolts through the lower of the holes in the recesses, the projections or pins engaging the upper holes. The knife is used in this position until it cannot be ground further, when it is removed and replaced by passing each bolt through the u pper of the two holes in-the recess and the pin into the lower hole. The knife can then be again used, and it will be clear that its life is doubled by my method of securing it to its carriage. 1

In the accompanying drawings, Figure 1 is a sectional elevation of a guillotine-knife, showing my improved method of attachment to the carriage, the knife being secured in its first position. Fig. 2 is a view similar to Fig. 1, but showing the knife secured to the carriage in the second position. Fig. 3 is a sectional elevation of the knife. Fig. 4: is a front elevation of a portion of the knife. Fig. 5 is a side elevation of one of the clamping-bolts,

and Fig. 6 is an end elevation thereof.

a is the carriage, and b is the knife.

c is one of therecesses which are formed at the top or back of the knife 5, thesaid'recess beingshown circular in shape.

61 and e are the two holes which are drilled in the knife in each recess 0, these holes be- --ing of the same size. and arranged diametrically opposite to one another on a vertical line through the center of the recess'c.

fshows oneof the clamping-bolts for securing the knife I) to the carriage'a, the said boltf having an eccentric head g of a shape andsize to fit. into the recess 0, as clearly shown. The diameter of each bolt f is equal to the diameter of the holes d and e.

h is the projection or pin which is formed upon the head g of the bolt f and upon the same side thereof as the said bolt f, this pin or projection being also of the same diameter as theholes d and 8. With this arrangement the knife I) is first secured to the carriage a in the position shown in Fig. 1-that is to say, the bolts f are passed through the holes 6 in the recesses c and the pins it through the holes d, so that the knife I) is clamped to the carriage by means of the nuts't' in the uppermost position. The knife can then be used in this position until it has been gradually worn away by grinding to the length shown in Fig. 2-, whereupon it is removed from the carriage and again clamped thereto, this time by pass ing the bolts f through the upper holes d in the recesses, the projections or pins h fitting into the lowermost holes e. It will thus be seen that the knife is then lowered to an extent equal to the distance between the centers of the holes at and e and can be again used until its length is reduced in grinding to an extent equal to that which it was reduced when fitted in the first position. (Shown in Fig. 1.) It will therefore be seen that the life of the knife is'doubled.

Having now particularly described and ascertained the nature of my saidinvention and in what mannerthe same is to be performed, I declare that whatlclaim is- 1. A knife for guillotine paper-cutting machines, provided with a hole for the passage of a bolt therethrough, and a recess eccentric to said bolt-hole, of a bolt having a shank adapted to extend through said bolt-hole in the knife, and having its head provided with eccentric portions to engage said recess in the knife, whereby said knife may be adjusted by tn rning said bolt, substantially as described.

2. The combinationwith a knife for guillotine cutting-machines, provided at intervals with a pair of apertures arranged in a line substantially perpendicular to the edge of the blade, and a series of bolts, each having a shank adapted to pass through one of said pair of apertures, and having its head provided with an eccentric projection adapted to pass through the other aperture of a pair, whereby said knife may be adjusted by removing said bolts and reversing them, substantially as described.

3. In a guillotine cutting machine, the combination with the knife-carriage provided with a bolt-hole formed therein, of the knife provided on one face with a recess, and having two holes formed in the knife at the'bottom of said recess, said holes being in a line substantially perpendicular to the cutting edge, of a securing and adjusting bolt having a shank adapted to pass through one of the holes in said knife, and the hole in the knife-carriage, said bolt having a head adapted to fit in said recess of the knife and provided with a projection to engage the other of said holes, substantially as described.

4. A knife forguillotine paper-cutting machines having a number of recesses formed at its top or back, the said recesses being provided with two holes through the knife, substantially as, and for the purpose, hereinbefore described.

* THOMAS BOULTON KENDELL.

\Vitnesses:

JOHN E. BOUSFIELD, C. G. REDFERN. 

